import router from './routers';
import store from '@/store';
import Config from '@/settings';
import NProgress from 'nprogress'; // progress bar
import 'nprogress/nprogress.css';// progress bar style
import {getToken} from '@/utils/auth'; // getToken from cookie
import {buildMenus} from '@/api/system/menu';
import {filterAsyncRouter} from '@/store/modules/permission';

NProgress.configure({showSpinner: false});// NProgress Configuration

const whiteList = ['/login'];// no redirect whitelist

router.beforeEach((to, from, next) => {
    if (to.meta.title) {
        document.title = to.meta.title + ' - ' + Config.title;
    }
    NProgress.start();
    if (getToken()) {
        // 已登录且要跳转的页面是登录页
        if (to.path === '/login') {
            next({path: '/'});
            NProgress.done();
        } else {
            if (store.getters.roles.length === 0) { // 判断当前用户是否已拉取完user_info信息
                store.dispatch('GetInfo').then(() => { // 拉取user_info
                    // 动态路由，拉取菜单
                    loadMenus(next, to);
                }).catch(() => {
                    store.dispatch('LogOut').then(() => {
                        location.reload(); // 为了重新实例化vue-router对象 避免bug
                    });
                });
                // 登录时未拉取 菜单，在此处拉取
            } else if (store.getters.loadMenus) {
                // 修改成false，防止死循环
                store.dispatch('updateLoadMenus');
                loadMenus(next, to);
            } else {
                next();
            }
        }
    } else {
        /* has no token*/
        if (whiteList.indexOf(to.path) !== -1) { // 在免登录白名单，直接进入
            next();
        } else {
            next(`/login?redirect=${to.fullPath}`); // 否则全部重定向到登录页
            NProgress.done();
        }
    }
});

export const loadMenus = (next, to) => {
    buildMenus().then(res => {
        const sdata = JSON.parse(JSON.stringify(res));
        const rdata = JSON.parse(JSON.stringify(res));
        const sidebarRoutes = filterAsyncRouter(sdata);
        const rewriteRoutes = filterAsyncRouter(rdata, false, true);
        rewriteRoutes.push({path: '*', redirect: '/404', hidden: true});

        store.dispatch('GenerateRoutes', rewriteRoutes).then(() => { // 存储路由
            router.addRoutes(rewriteRoutes); // 动态添加可访问路由表
            next({...to, replace: true});
        });
        store.dispatch('SetSidebarRouters', sidebarRoutes);
    });
};

router.afterEach(() => {
    NProgress.done(); // finish progress bar
});
